Sleeve mounting means



Aug. 25, 1964 J, cHRls'rENsEN 3,145,451

SLEEVE MOUNTING MEANS Filed Deo. 2e, 1962 FIG. 4 lL-/G- 5 1N VENTOR. JAMES CHR/.sm/.sf/v' R50/NMD /v//c Ks A T TURA/EY United States Patent O 3,145,451 SLEEVE MGUNTENG MEANS James Christensen, Lancaster, Ia., assigner to Schick Eiectric Inc., a corporation of Deiaware Filed Dec. 26, 1962, Ser. No. 247,073 3 Claims. (Cl. 29-117) The object of the invention is to provide a simple, n

inexpensive construction of cooperating roller or driven member and mounting means so organized as to enable them to be readily assembled and disassembled and, when assembled, to ensure against slippage-that is, relative rotary motion-of the one with respect t0 the other.

For purposes of illustration, the invention is shown and will be described with reference to` the mounting of the fbrush or polishing element of an electric shoe polisher. Generically, the brush will be referred to as the sleeve member and the driving member inserted into it as the mounting member.

The invention will be readily understood from the following description of the accompanying drawings of a preferred form, in which:

FIG. 1 is a partially broken out and sectioned side elevational view of a shoe polisher roller and its mounting member according to the invention;

PEG. 2 is a perspective view of the mounting member of FIG. 1;

IIG. 3 is a top plan view of the mounting member; an

FIGS. 4 and 5 are elevational views, respectively, of the left and right hand ends of the mounting member.

In general, the invention contemplates a sleeve member having a hollow, semi-rigid, cylindrical core and a mounting member for insertion into one end of the core, the mounting member, of one-piece construction for press-fitting by hand into the core, at its leading end being of circular cross section dimensioned to enter and closely t the core and` from adjacent its leading end toward its trailing end, having a gradually increasing maximum diameter and being out of round, whereby to deform the core at and adjacent its entered end to substantially elliptical shape.

In FIG. 1, the sleeve member, generally designated 10, is shown as consisting of a core 11 having its entire cylindrical outer surface coated or covered with textile or other suitable polishing material 12. The core is made of any suitable materialpaper board, plastic or the like-and is semi-rigid in the sense that while stiff, it will yield or deform when the mounting member is forced into it under normal hand pressure.

As viewed in FIGS. l and 2, the profile of the mounting member, generally designated 15, is seen to be more or less wedge shaped, with a uniform taper throughout its length. Its leading or entering end 16, as stated, is circular and provides a close fit with the core 11 of the driven member 10.

Throughout its length, which is substantially less than that of the driven member, the mounting member is formed with smooth, continuous upper and lower arcuate surfaces 17, 1S, which are relatively short in the circumferential direction but nevertheless extend a sufficient distance on each side of the top and bottom cen- ICC ter as to have no tendency to cause the core of the sleeve member to crease or take abrupt or angular bends as it is deformed. The flanges 19, 20, of course, serve to limit the entry of the mounting member into the sleeve member. p

The .arcuate surfaces 17, 18, diverge slightly as they recede from, the leading end, providing the gradually increasing maximum diameter mentionedV above and, of course, exceedingthe normal diameter of the core 11. Not only 'do these surfaces diverge towardthe trailing end but they also become what is referred to above as out of round. j By that is meant that they cease to be parts of a circle concentric with the circular leading end of the mounting member. In other words, as shown in FIG. 5, they become the major axis arcuate ends of an elliptical form; that is, the arcs at the ends of the major diameter of a generally elliptical shape. Accordingly, the insertion ofthe mounting member intothe sleeve member deforms the latter to the substantiallyelliptical shape indicated by Ythe broken outline 22 in FIG. 4; This, it is found-results in an extremely effective nonslipping drive v'connection between the two members. Because of its deformation to elliptical form, the core, in effect, is keyed to the mounting member, so that relative rotation between the two members is resisted not by friction alone (as would be the case if the mounting member were merely tapered and of circular section throughout) but hy friction plus the resistance of the core of the sleeve member to the continual deforming and reforming which relative rotation between the members would entail. In the result, the two members can be much more readily engaged and disengaged, by endwise relative movement, than if an equal driving torque were obtained by friction alone.

In the preferred form illustrated, the sides of the out of round portion of the mounting member, intermediate the arcuate surfaces, consist of parallel flats 23, 24.

As will be recognized, the mounting member is appropriately designed for convenient moulding of suitable plastic and is cup shaped or tubular throughout the major portion of its length, the base 25 of the cup supporting an internal hub 26 to receive a shaft (not shown) to which the mounting member may be secured in any appropriate Way.

In order to accommodate the mounting member to reasonable tolerances for the internal diameter of the core of the sleeve member, provision may be made for imparting a degree of yieldability to the arcuate portions 0f the mounting member, especially in the region of maximum diameter. As shown, the longitudinal or lower edge 30 of dat 23 is separated and spaced from arcuate portion 18 by a slit 31; and, similarly, the diametrically opposite or upper edge 32 of flat 24 is spaced from arcuate portion 19 by a slit 33. Thus the slits will permit a slight bodily yield of the adjacent larger diameter areas if the insertion of the mounting member into the deformed core encounters abnormal resistance, due t0 the core being somewhat undersize.

t will be seen and understood, of course, that the major axis diameter of the mounting member at its trailing end is of greater length than the normal (that is, prior to assembly) internal diameter of the deformable core and that, to accommodate the resulting elliptical deformation of the core, the minor axis diameter of the trailing end, of the mounting member (Whether or not the sides are atted) is necessarily less than the normal internal diameter of the core. However, it is found that the amount of deformation of the core required to effect a secure attachment of the sleeve member to the mounting member is not such as to impair or interfere with the action of the outer or applicator surface of the sleeve member in use.

The following is claimed:

1. The combination of a sleeve member having a hollow, semi-rigid cylindrical core and a mounting member disposed Within one end of the core, the mounting member at its leading end being of circular cross section dimensioned to closely fit the core, and from adjacent its leading end toward its trailing end having successive cross sections comprising oppositely disposed, relatively short arcuate portions of gradually increasing distance from one another,` with intervening parallel flats, the portion of the mounting member incorporating the ats being tubular and open at its trailing end, one longitudinal edge of one flat being spaced from one of the arcuate portions and one longitudinal edge of the other flat being spaced from the other arcuate portion.

2; The combination of a sleeve member having a hollow, semirigid, normally cylindrical core and means deforming one end of the core to elliptical cross sectional form comprising a one-piece mounting member disposed in said one end of the core, the mounting member at its leading end being of circular cross section dimensioned to fit the core and from that end toward its trailing endA being of generally elliptical cross sectional form incorporating diametrically opposite curved surfaces comprising the major axis arcuate ends of the elliptical form, 'the length of said major axis at the trailing end of the mounting member kbeing greater than the normalV internal diameter of the core and the length of the minor axisof the mounting member at its trailing end being less than the normal internal diameter of the core and the mounting member in the central longitudinal section through said major axis presenting a uniform taper from its trailing end to its leading end, the mounting also being tubular throughout the major portion of its length and its Walls intermediate the said major axis arcuate surfaces incorporating longitudinal slits which are open-ended at the trailing end of the mounting member, for the purpose described.

3. T he combination of a sleeve member having a hol: low, semi-rigid, normally cylindrical core and means deforming one end of the core to elliptical cross sectional `form comprising a one-piece mounting member die posed in said one end of the core, the mounting member at its leading end being 'of circular cross section dimensioned to fit the core and fromthat end toward and at its trailing end being of generally elliptical cross sec tional form incorporating diametrically opposite curved surfaces comprising the majorv axis arcuate ends of the elliptical form, the length of said major axis at the trail ing end of the mounting member being greater than the normal internal diameter of the core and the length of the minor axis of the mounting member at its trailing end being less than the normal internal diameter of the core and the mounting member in the central longitudinal section through said major axis presenting a uni# form taper from its trailing end to its leading end.

References Cited in the tile of this patent UNITED STATES PATENTS 

3. THE COMBINATION OF A SLEEVE MEMBER HAVING A HOLLOW, SEMI-RIGID, NROMALLY CYLINDRICAL CORE AND MENAS DEFORMING ONE END OF THE CORE TO ELLIPTICAL CROSS SECTIONAL FORM COMPRISING A ONE-PIECE MOUNTING MEMBER DISPOSED IN SAID ONE END OF THE CORE, THE MOUNTING MEMBER AT ITS LEADING END BEING OF CIRCULAR CROSS SECTION DIMENSIONED TO FIT THE CORE AND FROM THAT END TOWARD AND AT ITS TRAILING END BEING OF GENERALLY ELLIPTICAL CROSS SECTIONAL FORM INCORPORATING DIAMETRICALLY OPPOSITE CURVED SURFACES COMPRISING THE MAJOR AXIS ARCUATE ENDS OF THE ELLIPTICAL FORM, THE LENGTH OF SAID MAJOR AXIS AT THE TRAILING END OF THE MOUNTING MEMBER BEING GREATER THAN THE NORMAL INTERNAL DIAMETER OF THE CORE AND THE LENGTH OF THE MINOR AXIS OF THE MOUNTING MEMBER AT ITS TRAILING END BEING LESS THAN THE NORMAL INTERNAL DIAMETER OF THE CORE AND THE MOUNTING MEMBER IN THE CENTRAL LONGITUDINAL SECTION THROUGH SAID MAJOR AXIS PRESENTING A UNIFORM TAPER FROM ITS TRAILING END OF ITS LEADING END. 